Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753687AbcDJUCW (ORCPT ); Sun, 10 Apr 2016 16:02:22 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53902 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756271AbcDJTIZ (ORCPT ); Sun, 10 Apr 2016 15:08:25 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Benjamin Tissoires , Jiri Kosina Subject: [PATCH 4.4 090/210] HID: multitouch: force retrieving of Win8 signature blob Date: Sun, 10 Apr 2016 11:35:11 -0700 Message-Id: <20160410183529.816941111@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1236 Lines: 40 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Benjamin Tissoires commit 45c5c6828214605eaefa6755c47bd1a2c7eb203e upstream. The Synaptics 0x11e5 over I2C found in the Asus T100-CHI requires to fetch the signature blob to actually start sending events. With this patch, we should be close enough to the Windows driver which checks the content of the blob at plugin to validate or not the touchscreen. Link: https://bugzilla.kernel.org/show_bug.cgi?id=113481 Fixes: 6d4f5440 ("HID: multitouch: Fetch feature reports on demand for Win8 devices") Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman --- drivers/hid/hid-multitouch.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -396,6 +396,11 @@ static void mt_feature_mapping(struct hi td->is_buttonpad = true; break; + case 0xff0000c5: + /* Retrieve the Win8 blob once to enable some devices */ + if (usage->usage_index == 0) + mt_get_feature(hdev, field->report); + break; } }